Speaking amid a tour of European capitals to gauge support among Doha's traditional allies, Sheikh Mohammed said there was "no proof" to accusations that his country financed terrorist groups, supported the Muslim Brotherhood and the Palestinian group Hamas and had close ties with Iran.

Qatar's sovereign wealth fund has major stakes in top Western companies such as Credit Suisse CSGN.S. The scale and economic importance of the airline's UAE operation are not far behind that of Saudi Arabia.

For Qatar Airways, this means the airline will have to go through the expensive process of rerouting its Africa-bound flights to avoid the Arabian Peninsula.

Iran's Foreign Ministry has urged the Arab nations who have cut ties to Qatar to negotiate an end to the crisis.

Iranian Foreign Ministry spokesman Bahram Ghasemi said Monday the two sides should resolve their differences through negotiations. Qatar has called those charges baseless.

"I don't think it is something we are worrying about too much". Qatar denies sponsoring terrorism and accuses the Saudis of seeking to dominate smaller neighbors.

Qatar's financial markets stabilized on Monday after a week of losses as the government showed it had ways to keep the economy running in the face of sanctions by other Gulf states.

On June 5, the countries cut diplomatic ties to Qatar and ordered all Qataris out within 14 days.

Maersk Line immediately said it would accept new bookings for feeder shipments from Oman, with the first vessel scheduled to depart Salalah on 19 June and arrive in Doha on 25 June.